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The Hidden Power of Cold: More Than Just Temperature When you step into a cold plunge, your body's immediate response extends far beyond the obvious shiver. Beneath the surface of your skin, a sophisticated network of nerves springs into action, orchestrating a cascade of physiological changes that influence everything from your heart rate to your stress response. At the center of this remarkable process lies the vagus nerve, the longest cranial nerve in your body and a master regulator of...